Golf-practice device



D. D. DALL GOLF PRACTICE DEVICE Filed May :51 1923 July-- a, 1924.

INVENIDB, 9M/uid 04m/m Maz@ Patented July 8, 1924.r h..

UNITED 'srA'rss `mivjm nnwna DALL, or TORONTO, ONTARIO, ciilviirmfl f GOLF-PRACTICE DEVICE.v`

Y- Appncati'n med my a1, 1923. serial No. 642,716.

To all whomc't may concer/m1 v Be it known that I, DAvm DnwAR DALL, a subject of the King of Great Britain, residing at 185 St.Y Clarens Avenue, in the city of Toronto, Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements in Golf- Practice Devices, of which the following is a specication. f f -f The invention relates to improvements in golf recording and exercising device as describedV in the present specification and shown in, the accompanying drawing that forms part of the same.

The invention appertains to Va device whereby the magnitude of the driving force of a golf player is recorded by a registering machine through its connections with a tethered golf-ball.

This device has for its object the exercising and improving of golf ability and can be competitively used by two or more players by comparison of their individual score records; furthermore is adapted for use within limited spaces either in or out-ofdoors and does not require to be secured during its usage.

Referring to the drawing, Figure 1 is a side elevation of the device.

Figure 2 is a top plan view.

Figure 3 is a centrd, vertical sectional view.

Figure 4 is a transverse sectional view taken on the line 5 5 of Figure 2.V

Like numerals of reference indicate corresponding parts in each gure.

In the drawing, 1 designates the case or frame of the registering machine comprising a substantial rectangular base 2 having inclined sides .3 rising therefrom to a top 4C, said top sloping rearwardly obtusely so as to lie about parallel to the path of the ball in motion; the rear portion being cut away to constitute an opening therethrough as at 5.

Formed in the top thereof is a ratch slideway 6 extending longitudinally thereof and being rectangular in cross section and subjacent thereto is a click housing 7 substantially strengthened by integral webs, the housing being bored with a constriction forming a shoulder to constitute a spring seat as at 8.

9 is a graduated ratch disposed with its teeth face downward in the slide-way 6 and passing through a click l() operatively arranged in the housing 7, the teeth there- 1,500,183 PAT-ENT -0FF1E of being engageable with the teeth of said ratch for the vpurpose of precluding `reverse movement, the top end of which click isneatlyrounded olf as at-ll. V: Positioned in the housing bore, andV shouldered between the constriction thereof andthe click, is a compression spring 12 which Y`is adaptedto exert a'pressure upon the latter to hold it in engagement with the ratchfff f A Y' f 13 is an extension spring secured at yone end to the rear of thecase, the other end beingv secured to the bifurcated .terminus ofthe ratch,`and is providedgfor the purpose of restraining the outward movement of said ratch.

14 is a cover-plate detachably secured by means of screws to the case top 4 and provided with a slot to receive the protruding end 11 of the click 10. The front edgev 15 of the cover-plate serves as a mark for reading the graduations of the ratch, such reading being zero inthe normal position of the ratch. The graduations being preferably spaced a distance corresponding to the pitch of the teeth so'that as each tooth advances over the click a corresponding graduation will register with said front edges 15 of the top-plate thereby recording the magnitude of the pull upon the ratch.r l

In order. to Y encase the mechanism as much as possible a bottom plate 16 is provided, detachably? secured by screws or` otllierwise fastened as maybe found desirab e.

17 are pads aiiiXed to the underside of the base-plate., preferably constructed of rubber to create friction when engaged with a support, thus imparting rigidity to the device in usage.

18 is a golf-ball connected to the tether 19 of suitable length which in turn is connected to the bifurcated extremity of the ratch, such connection comprising secura tion of the Vtether around the pulley 2() which Yis rotatably disposed between; the members of said Vbifurcated end, thus permitting freedom of movement of said tether.

In the operation of this devicethe ball is situated about the length of the tether to the rear of the machine.

The player thenY strikes the ball propelling saine in the Vdirection of the machine; the momentum ofv the ball due to the driving force of the player is dissipated in drawing out the ratch against its spring pressure, Whilst the retraction of the ratch isi prevented by the click engaging in the teeth thereof.

The magnitude of the driving force is indicated by the degree coinciding with the front edge of the plate through the Withdrawal of the ratch. To retractrthe ratch it is merely necessary to depress the protruding end ll of the click 10.

What I claim istl. In a device of the class described, a case, friction pads affixed to its bottom, a graduated ratch slidable in said case, atension spring secured to said ratch and tof-said case, a spring-pressed click disposed in the case and engaging the ratch teeth to retain the ratch in an extended position, means cooperating with the graduationy upon the ratch to indicate its extended position, a tether, a golf ball, said tether being secured to the ratch and golf ball.

2. In a device of the class described, a case comprising a substantial rectangular base, friction pads aiiixed to its bottom, inclined sides, a rearwardly sloping top, such sides rising from said base to meet said top, a slideWay formed in said top, a graduated ratch slidably mounted in said slideway, a

to retain the ratch in an extended position, A

means cooperatingwith the graduationupon the ratch to indicate its extended posi-v.

tion, a tether, a golf ball, said tether being secured to the ratch and golf ball.

Signed atv Toronto, Ontario, Canada', this twenty-ninth (29th) day of May, 1923.

DAVID DEWAR DALL.-

Witnesses: i W. H. MARSDEN, F. C. BROMLEY. 

